[libgomp, doc, patch] document implementation specific default values

[Daniel Franke <franke.daniel@gmail.com>]

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:ADDPATCH libgomp:


2007-01-07  Daniel Franke <franke.daniel@gmail.com>

	* libgomp.texi: Document implementation specific default values of 
environment variables.


As requested by Tobias in private mail, this patch adds the default values of 
OMP related environment variables to the corresponding sections of the 
documentation.

Ok for trunk?

	Daniel


P.S. After these changes got applied, I will backport the docs to 4.2.

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Index: libgomp.texi
===================================================================
--- libgomp.texi	(revision 120546)
+++ libgomp.texi	(working copy)
@@ -412,10 +412,6 @@
 sections, if those do not specify a @code{num_threads} clause. The 
 argument of @code{omp_set_num_threads} shall be a positive integer. 
 
-If the argument is negative integer or zero, the application will crash or
-stop, respectively. An enhancement request was filed,
-@uref{http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29949, PR29949}.
-
 @item @emph{C/C++}:
 @multitable @columnfractions .20 .80
 @item @emph{Prototype}: @tab @code{void omp_set_num_threads(int);}
@@ -807,7 +803,8 @@
 @item @emph{Description}:
 Enable or disable the dynamic adjustment of the number of threads 
 within a team. The value of this environment variable shall be 
-@code{TRUE} or @code{FALSE}.
+@code{TRUE} or @code{FALSE}. If undefined, dynamic adjustment is
+disabled by default.
 
 @item @emph{See also}:
 @ref{omp_set_dynamic}
@@ -825,7 +822,8 @@
 @item @emph{Description}:
 Enable or disable nested parallel regions, i. e. whether team members
 are allowed to create new teams. The value of this environment variable 
-shall be @code{TRUE} or @code{FALSE}.
+shall be @code{TRUE} or @code{FALSE}. If undefined, nested parallel 
+regions are disabled by default.
 
 @item @emph{See also}:
 @ref{omp_set_nested}
@@ -862,10 +860,11 @@
 Allows to specify @code{schedule type} and @code{chunk size}. 
 The value of the variable shall have the form: @code{type[,chunk]} where
 @code{type} is one of @code{static}, @code{dynamic} or @code{guided}. 
-The optional @code{chunk size} shall be a positive integer. 
+The optional @code{chunk size} shall be a positive integer. If undefined,
+dynamic scheduling and a chunk size of 1 is used.
 
 @item @emph{Reference}: 
-@uref{http://www.openmp.org/, OpenMP specifications v2.5}, section 4.1
+@uref{http://www.openmp.org/, OpenMP specifications v2.5}, sections 2.5.1 and 4.1
 @end table
 
 
@@ -895,7 +894,8 @@
 Set the default thread stack size in kilobytes. This is in opposition 
 to @code{pthread_attr_setstacksize} which gets the number of bytes as an 
 argument. If the stacksize can not be set due to system constraints, an 
-error is reported and the initial stacksize is left unchanged.
+error is reported and the initial stacksize is left unchanged. If undefined,
+the stack size is system dependent.
 
 @item @emph{Reference}: 
 @uref{http://gcc.gnu.org/ml/gcc-patches/2006-06/msg00493.html,